Rear Entertainment Control Module (RECM)
The RECM is a multi functional module that controls a number of functions related to the Ultimate vehicle as follows:
- iPad™ and audio source
- iPad™ charging
- Bottle cool box control
- Table lift
- Interior lighting.
The RECM is located in the rear floor console, below the Rear Integrated Control Panel (RICP). The RECM is attached to the floor console structure with four bolts and connected to the additional Ultimate floor console harness with two electrical connectors.
The module is woken up with the vehicle systems. The CJB outputs a signal voltage from the battery saver relay or Rear Seat Entertainment (RSE) remote control charging status signal which will wake up the RECM.
When the vehicle systems shut-down, and the voltage from the battery saver relay or Rear Seat Entertainment (RSE) remote control charging status signal is removed, the RECM will also shut-down. The RECM monitors the battery voltage via a direct supply from the vehicle primary battery. If the voltage falls to 6.5 V or below the RECM will shut-down to save primary battery power and preserve data.
Switch inputs are monitored by the RECM, which can detect stuck switch occurrences. Momentary switches need to be pressed for a minimum of 50 ms for the RECM to react to the switch request. If a momentary switch is operated continuously for twice its defined operating period of 1 second (for all switches apart from the table switches), the switch input is considered stuck and is disabled until the switch has been released for at least 1 second. The period for the table switches is 10 seconds before the RECM considers the switch input to be stuck.
Microswitches for the table and bottle cool box lid do not have a switch stuck strategy. Any change of state however will require a constant signal of at least 5 ms.
The ambience lighting and interior lighting is operated using a PWM input from the CJB. The PWM input is replicated by the RECM to provide fade on and off of the interior lighting. The mood lighting is controlled by a PWM output from the instrument panel dimmer control in the auxiliary lighting switchpack.